The early Cheetah Ansons had metal Fairey -Reed fixed pitch props. Later types such as the Mk.19 had a variable pitch Rotol prop and the above mentioned sounds to be one of these post war types. Canadian Jacobs engine’d Ansons had fixed pitch wooden props whilst the P&W Mk.V’s had Hamilton Standard metal variable pitch props. Oxfords with Cheetah’s had wooden props.

John